Rotary fan



W. P. ARON Sept. 9, 1930.

ROTARY FAN Filed Aug. 3. 1928 Wi/Lfimn RAM/1w 1 N VEN TOR.

A TTORNE Y.

' plate 8 by nuts .3.

the said bracket member is securely held, as is ed over protruding bolts afiixed to the motor.

Thus, the motor is capable of rocking movement with respect to its axis on the described suspension means, to bring about opposite rotation and for other purposes.

Encircling the cup member 12 is a member 17which shall be hereinafter referred to as the contact plate, and which is insulated from the cup member 12 bya ring 18 composed of.

non-conductive material. This plate 17 has embedded in its operative surface annular contact rings 19, as also apparent in Figure 3, and it is the-inner contact ring, instead of the plate 17 that is required to be insulated from cup member 12, since the plate 17 itself is composed of non-conductive material. It is also seen in Figure 3 that an intermediate annular ridge 20, is formed between the contact rings 19 from the plate 17 to insulate.

Wires 21, separately connected to the contact rings 19, convey current therefrom to the motor 1, as apparent in Figures 2'and 3. Therefore, to complete the circuit through these rings 19, contact posts 22 are provided and detachably held secure to the armature The contact posts 22, be ing recessed at one end, as apparent in Figure 3, are capable of receiving carbon brushes 24, held normally against the cont-act rings 19 by springs 25 encased within hollow sleeve member 26, threaded into the recess in the end of the contact post 22, and so fian'gedat its lowermost end as tocon'strain the brush 24 against dislodgement. It willbe observed that one of the brushes 2 1 has slidable engagement with the inner contact ring 19 while the other contacts in a similar manner with the outer ring 19. Thus a constant and uninterrupted current is established tothe motor 1 through the relatively rotatable plates 8 and 17 from the source through Wires27, entering through the hollow conduit 7, one of which is connected to each of the brushes 24, in the IHEIHIIGIShOWIl in Figure 3.

The directions of air currents incited by the propeller 3 are directed rearwardly, that is,

in the direction of the motor 1, due to the angle of pitch of theblades. The deflector, comprised of fins 28 is attached to the motor by brackets 29 at either end of the latter and is further held by bracket at 30 against which is urged the nut 16 employed for securing the armsof the suspension means. To vcause rotation of the entire structure, the fins. 28 are the fan, the action of the blades of the propeller driving the air forcibly thereagainst, and the angle to which the fins are Warped determines the direction in Which the structure will rotate. a

It is understood that if one of the fins 28 of the fan is Warped to a greater angle than the companion fin, the surface exposed to the air currents excited by the propeller 3-," will be greater and consequently the entire structure will be thereby revolved. In order to effect rotation of the structure in an opposite direction, it is necessary only to manually change the angle of warp in the fins, being careful that one fin receives only a minimum I of the air currents while the other receives the maximum. It is necessary that the fins be arranged at difierentangles before any rotary movement of the structure is possible.

The fins 28 comprising the deflector must be on an inclined plane relative to the motor before the fan will effect rotationon its sus= pension. I

It has been made clear that the lowerplate 17 is rotative with respect-to the upper plate 8, the latter being stationary with the-supporting conduit 5. The cup shaped member 12, being stationary with respect Itothe lower plate 17 therefore revolves around-the stem 7 through which passes the wires 27. The stem 7 has been mentioned ashavi-ng an enlarge- Warped to receive the air currents directed by ment 10 on its lower endand as shown inF-ig- 2 ure 3. To this enlargementis secured by screws .31 a cylindricalniembe'r 32, the periphery of which is smooth, and is slightly smaller in circumference than the smooth inner periphery of the cup shaped member 12 in which it' is received. This affords-abrak ing surface against which thethreaded element 33 is urged, as apparent in Figure To more fully explain this brake, the retainer ring 13 applied to secure the structure to the support, has integral therewithan interiorly threaded boss 34, extending laterally from its side, into which is threaded'theelement 33, which as apparent in F igure 3 is slotted longitudinally to insure proper tension. When this element or brake-screw 33 is rotated in a clock-Wise direction, it isurged against the cylinder 32,- binding the same against further rotation, consequentlyv arresting the rotative action of the fan-without a-ffecting the movement of the propeller- 3.1

In order to accomplish the foregoingfrom a convenient point on'the floor,@-lateral arms 35 are applied tothe outer end of the brake screw 33, as shown-especially inFigure' 4, depending from the ends of whichare cords 36. A pull upon one of thecordswill bring the screw into operativeengagement-with the cylinder 32, while a pull upon the other will relieve the binding action thus created, on

aoling the fan-tores-uine normalrotation;

Briefly setting-forth the operation of'the' fan; the current passes through the wires 27 through brushes 2 f into contact rings 19, thence through wires 21 to motor 1 to operate the same. Control of the latter is possible through switch 4 through wire 37.

Manifestly, the construction set forth in the foregoing and shown in the accompanying drawing is capable of considerable modification and such modification as is considered within the scope of the appended claims is also considered within the spirit of the invention.

I claim 1. A fan including a motor, a bracket having opposite arms embracing opposite sides of the motor, means to pivotally connect the end portions of the arms to said opposite sides of the motor, a support overlying the bracket, means to turnably connect the bracket to the support, electrical connections between the support and the bracket for supplying current to the motor, oppositely disposed wings extending outwardly from and secured to opposite sides of the motor, and a propeller car ried by the motor and arranged in the front of the Wings.

2. A fan including a motor, a bracket having opposite arms embracing opposite sides of the motor, means to pivotally connect the end portions of the arms to said opposite sides of the motor, a support overlying the bracket, means to turnably connect the bracket to the support, electrical connections between the support and the bracket for supplying current to the motor, oppositely disposed wings extending outwardly from and secured to opposite sides of the motor, a propeller carried by the motor and arranged in the front of the Wings, braking means having rigidconnection with the support, means carried by the bracket to engage the braking means, and means to operate the last named means at a point remote therefrom.

3. A fan including a motor, oppositely disposed wings extending outwardly from opposite sides of the motor, means to secure the wings to said sides of the motor, an overhead support, means to turnably support the motor from said overhead support, electrical connections between the overhead support and said motor support for supplying current to the motor, and a propeller carried by the motor and arranged in front of the wings.

4. A fan including a motor, oppositely disposed wings extending outwardly from opposite sides of the motor, means to secure the Wings to said sides of the motor, an overhead support, means to turnably support the motor from said overhead support, electrical connections between the overhead support and said motor support for supplying current to the motor, braking means carried by the overhead support, means on said motor supportlng means to engage the braking means, and

means to operate said means which engages the braking means thereby to brake the motor supporting means.

11 testimony whereof I aiiix my signature.

WILLIAM P. ARON. 

